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The Goodman B1392139 View Port Bushing is a genuine OEM grommet that seats and seals the inspection sight-glass opening on the burner compartment of your ACEC801005CXAA gas furnace. It keeps the viewing port airtight so the flame can be safely inspected without allowing flue gases or combustion air to escape around the opening. A cracked, brittle, or missing bushing is a common cause of nuisance flame-sensing and pressure-switch issues.
The OEM B1392139 is molded to the exact port diameter and uses a high-temperature compound rated for the burner box environment. Generic bushings often run undersized or use lower-temp material that hardens and cracks. For a reliable seal at the inspection port, OEM is the recommended choice.
Easy (1/5). Power down the furnace, pop the old bushing out of the port, and press the new one into place. No tools required. Always confirm power is off at the disconnect before servicing.